Unitest TELARIS EARTH, Instruction Manual

Page: 23 / 40

Table 6.3.1:
References to evaluate measurement results
(in compliance with DIN VDE 0413 Part 7)
State of the earth resistance earth resistance
ground bar ground connection flat ground connection
3m deep 5m deep 5m long 10m long
marshy soil/swamp 10
Ω
5
Ω
12
Ω
6
Ω
arable land/clay 33
Ω
17
Ω
40
Ω
20
Ω
humid sandy soil 66
Ω
33
Ω
80
Ω
40
Ω
dry sandy soil 330
Ω
165
Ω
400
Ω
200
Ω
stony soil 1000
Ω
500
Ω
1200
Ω
60
Ω
concrete1:5 160
Ω
80
Ω
required max. permissable resistance maximum displayed test value
0,3
Ω
0,18
Ω
0,4
Ω
0,28
Ω
0,5
Ω
0.37
Ω
0,6
Ω
0,46
Ω
0,7
Ω
0,56
Ω
0,8
Ω
0,65
Ω
0,9
Ω
0,75
Ω
1,0
Ω
0,84
Ω
2,0
Ω
1,85
Ω
3,0
Ω
2,79
Ω
4,0
Ω
3,73
Ω
5,0
Ω
4,67
Ω
For a required earth resistance as shown in Table 6.3.1, the measured value must not
exeed the values in the table below taking into account instrument error.
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